I won’t go into the details of the Webley history, that’s for interested individuals to pursue and Mr. Winfer’s book is a good read.  Some of my descriptions of processes will be boring to folks that aren’t into building these actions, a few others, I hope it helps.  The Webley I’m building is from a casting that Rodney Storie makes and his pattern was from the round block, which is referred to as a rook rifle.  As Wal mentioned, this rook rifle is not a scaled down version like so many of the other rook rifles are, the lever is still the size of the medium and large frame.  The action may be slightly smaller but then the round breech block changes the structure and stress load found in the medium action.  My norm in these builds is a 22rf in the first build followed by a CF of some sort.  A few of the originals were made into 32-40 and 25-35’s but I’m a little hesitant, so it’ll involve some calculations and thought.

Onward with the build at hand.  I began this by scratching surfaces with a file, attempting to come up with a flat or true surface as a reference.  The face of the action came in fairly close to flat with a few strokes of a file.  The bore for the breech block after taking some measurements said we had a little over a .110” to come out – plenty to work with.  A little scratching and comparing with a square to the lever slot I placed the casting in my lathe fixture, rough dialed the bore & face and took a light test cut in the bore.  All appeared well so I continued, bored this to the minor diameter for .850” – 16 thread and proceeded to thread and face the action.

Wonderful! I'm in! I will be following closely.
A couple questions. Is the breech block hole at a right angle to the bore?
Could you post a diagram of internal parts?

Anyway, thanks.

Wasn't the 32-40 a standard factory offering for the round block 1902? I handled one in the past and it made me salivate.

Definitely looks to be a challenge Greg.  But I know you will get it working.   
Been studying pictures of the originals and it’s going to be a good looking gun when done
Bob

A feature of this Webley that is new to me, (or at least a memory jog) but I’m finding it common to several British actions, a screw in the action frame just rear of the lever screw becomes a point that cocks the internal hammer.  The other feature this screw performs, it limits how far the lever opens…  When I finished making, installing/fitting that screw for this action so the hammer cocked, the breech block only has about .400” worth of travel.   Not an issue for a 22rf but it is a short stroking head scratcher getting there – how’s it going to work for a larger case?  This will take a little more study when I go there.  The attached photo shows the trigger to sear engagement (flat to round) and then how the sear mates to the hammer.  The area in front of the hammer pivot rides on the cocking screw.  The white painted dots were drilled and reamed for the pivot screws.

Richard, I also find the work holding as interesting as the gun building of Greg’s.

Greg, I feel for you on the lever opening issue.  The round block Sharps I’m working on, I had similar issue with the breech block travel and how far the lever opened.  Then I threw in the lever operated extractor and thing just got more complicated.   
Bob

Bob,
The only one I've ever seen a safety on was in a hornet caliber and it was a tang safety.  Never saw the internals so I'd guess it blocked the trigger?  I may adapt something for this build as I don't really have plans of putting a tang sight on it, but I think my CF build will use a tang sight so I may not include a safety.  Safe would be action empty and breech open.
Greg

There is a .240 flanged built by H&H floating around out there with a round block and a tang safety. I have held the rifle. The .240 always seemed like quite a bit of cartridge for that action but Holland thought it fine and it passed Nitro Proof. 

Neat build Greg.